Mop wringer



FIG. 1 is a top right front perspective view of a mop wringer, inreduced scale, showing our new design. The broken lines are forillustrative purposes only and form no part of the claimed design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a right side elevational view thereof; the left sideelevational view being a mirror image;

FIG. 4 is a top plan view thereof;

FIG. 5 is a rear elevational view thereof; and,

FIG. 6 is a bottom plan view thereof.

The ornamental design for a mop wringer, as shown and described.